diff --git a/examples/opengl3_example/Makefile b/examples/opengl3_example/Makefile
index bdd778e4..bb0a1946 100644
--- a/examples/opengl3_example/Makefile
+++ b/examples/opengl3_example/Makefile
@@ -24,7 +24,7 @@ ifeq ($(UNAME_S), Linux) #LINUX
 
 	CXXFLAGS = -I../../ -I../opengl_example/gl3w `pkg-config --cflags glfw3`
 	CXXFLAGS += -Wall
-	CFLAGS = CXXFLAGS
+	CFLAGS = $(CXXFLAGS)
 endif
 
 ifeq ($(UNAME_S), Darwin) #APPLE
@@ -36,7 +36,7 @@ ifeq ($(UNAME_S), Darwin) #APPLE
 	CXXFLAGS = -I../../ -I../opengl_example/gl3w -I/usr/local/Cellar/glew/1.10.0/include -I/usr/local/include
 	CXXFLAGS += -Wall
 #	CXXFLAGS += -D__APPLE__
-	CFLAGS = CXXFLAGS
+	CFLAGS = $(CXXFLAGS)
 endif
 
 .cpp.o:
diff --git a/examples/opengl_example/Makefile b/examples/opengl_example/Makefile
index 10212d94..2563bdb8 100644
--- a/examples/opengl_example/Makefile
+++ b/examples/opengl_example/Makefile
@@ -23,7 +23,7 @@ ifeq ($(UNAME_S), Linux) #LINUX
 
 	CXXFLAGS = -I../../ `pkg-config --cflags glfw3`
 	CXXFLAGS += -Wall
-	CFLAGS = CXXFLAGS
+	CFLAGS = $(CXXFLAGS)
 endif
 
 ifeq ($(UNAME_S), Darwin) #APPLE
@@ -35,7 +35,7 @@ ifeq ($(UNAME_S), Darwin) #APPLE
 	CXXFLAGS = -I../../ -I/usr/local/include
 	CXXFLAGS += -Wall
 #	CXXFLAGS += -D__APPLE__
-	CFLAGS = CXXFLAGS
+	CFLAGS = $(CXXFLAGS)
 endif
 
 .cpp.o: